Function extractJsonStringFieldPrefix

src/utils/sessionStorage.ts:5034–5062

* Like extractJsonStringField but returns the first `maxLen` characters of the * value even when the closing quote is missing (truncated buffer). Newline * escapes are replaced with spaces and the result is trimmed.

(
  text: string,
  key: string,
  maxLen: number,
)

 * escapes are replaced with spaces and the result is trimmed.
 */
function extractJsonStringFieldPrefix(
  text: string,
  key: string,
  maxLen: number,
): string {
  const patterns = [`"${key}":"`, `"${key}": "`]
  for (const pattern of patterns) {
    const idx = text.indexOf(pattern)
    if (idx < 0) continue

    const valueStart = idx + pattern.length
    // Grab up to maxLen characters from the value, stopping at closing quote
    let i = valueStart
    let collected = 0
    while (i < text.length && collected < maxLen) {
      if (text[i] === '\\') {
        i += 2 // skip escaped char
        collected++
        continue
      }
      if (text[i] === '"') break
      i++
      collected++
    }
    const raw = text.slice(valueStart, i)
    return raw.replace(/\\n/g, ' ').replace(/\\t/g, ' ').trim()
  }
  return ''
}

/**
 * Deduplicates logs by sessionId, keeping the entry with the newest